:root {
    /* 品牌主色 - 健康蓝 */
    --primary-color: #2C5282;
    --primary-gradient: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);
    --secondary-color: #4299E1;
    --accent-color: #E53E3E;
    
    /* 功能色彩 */
    --success-color: #06D6A0;
    --warning-color: #FFD166;
    --error-color: #E53E3E;
    --info-color: #4ECDC4;
    
    /* 文字色彩 */
    --text-primary: #2D3748;
    --text-secondary: #4A5568;
    --text-tertiary: #718096;
    
    /* 背景色彩 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7FAFC;
    --bg-card: #F7FAFC;
    --border-color: #E2E8F0;
    
    /* 间距系统 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.12);
    
    /* 过渡动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* === 导航栏样式 === */
nav {
    background: var(--bg-primary);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo img {
    height: 40px;
    width: auto;
}

.logo-text-cn {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

.logo-text-en {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: -2px;
}

nav ul {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav ul li {
    position: relative;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

nav ul li a:hover {
    color: var(--primary-color);
    background-color: rgba(0, 180, 216, 0.08);
    transform: translateY(-1px);
}

.nav-button {
    background: var(--primary-gradient) !important;
    color: var(--bg-primary) !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    box-shadow: var(--shadow-md);
}

.nav-button:hover {
    background: linear-gradient(135deg, #0077B6 0%, #005577 100%) !important;
    transform: translateY(-2px) !important;
    box-shadow: var(--shadow-lg) !important;
}

/* 老版健康管理中心按钮样式 - 橙色区分 */
.nav-button.legacy {
    background: linear-gradient(135deg, #f35d06 0%, #e65f05fb 100%) !important;
    color: var(--bg-primary) !important;
    border: 2px solid #ff9800 !important;
}

.nav-button.legacy:hover {
    background: linear-gradient(135deg, #f57c00 0%, #e65100 100%) !important;
    border-color: #f57c00 !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 8px 25px rgba(255, 152, 0, 0.3) !important;
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: rgba(0, 180, 216, 0.1);
    color: var(--primary-color);
    transform: none;
}

/* 移动端菜单 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--spacing-sm);
    background: none;
    border: none;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* === HERO 首屏区域 === */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #f0f7ff 0%, var(--bg-primary) 50%, #e6f3ff 100%);
    overflow: hidden;
    padding: var(--spacing-3xl) 0;
    margin-top: 80px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    animation: fadeInLeft 1s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, rgba(13, 142, 202, 0.1), rgba(6, 135, 221, 0.1));
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(16, 146, 206, 0.438);    
}

.hero-badge i {
    color: #FFD166;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.title-main {
    color: var(--text-primary);
}

.title-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.cta-primary, .cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    white-space: nowrap;
}

.cta-primary {
    background: var(--primary-gradient);
    color: var(--bg-primary);
    box-shadow: var(--shadow-lg);
}

.cta-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.cta-secondary {
    background: var(--bg-primary);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.cta-secondary:hover {
    background: var(--primary-color);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 180, 216, 0.1);
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.hero-visual {
    position: relative;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    transform: translateX(150px);
}

.phone-mockup {
    max-width: 300px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 180, 216, 0.3));
    animation: float 3s ease-in-out infinite;
}

.floating-card {
    position: absolute;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 120px;
    border: 1px solid rgba(0, 180, 216, 0.1);
    backdrop-filter: blur(10px);
}

.floating-card i {
    font-size: 1.5rem;
    padding: var(--spacing-sm);
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.1), rgba(144, 224, 239, 0.2));
    color: var(--primary-color);
}

.card-content {
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 2px;
}

.card-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.card-1 {
    top: 10%;
    left: -15%;
    animation: float 3s ease-in-out infinite 0.5s;
}

.card-2 {
    top: 30%;
    right: -15%;
    animation: float 3s ease-in-out infinite 1s;
}

.card-3 {
    bottom: 20%;
    left: -5%;
    animation: float 3s ease-in-out infinite 1.5s;
}

/* === 关于我们部分样式 === */
.about-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
    text-align: center;
}

.about-section .section-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.about-section .section-header {
    margin-bottom: var(--spacing-3xl);
    text-align: center;
}

.about-section .section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.about-section .section-header p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.featured-media {
    margin-bottom: var(--spacing-3xl);
    display: flex;
    justify-content: center;
    width: 100%;
}

.video-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    max-width: 800px;
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
    margin: 0 auto;
}

.video-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.video-card__logo img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.video-card__info {
    flex: 1;
}

.video-card__title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.video-card__description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.video-card__button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 8px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
}

.video-card__button:hover {
    transform: scale(1.1);
}

.video-card__button .play-icon {
    margin-right: 8px;
    font-size: 0.9em;
    color: #4299E1;
}

.video-card--cctv .video-card__button {
    background-color: #c0392b; /* 红色系，更匹配央视风格 */
}

.video-card--cctv .video-card__button:hover {
    background-color: #a93226;
}


/* 价值主张区域 */
.value-proposition {
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.05), rgba(144, 224, 239, 0.05));
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl) var(--spacing-lg);
    border: 1px solid rgba(0, 180, 216, 0.1);
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.value-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.value-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 180, 216, 0.2);
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.value-item:hover .value-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.value-icon i {
    font-size: 2rem;
    color: var(--bg-primary);
}

.value-item h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.value-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* === 产品部分样式 === */
.products-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, #EBF4FF 0%, var(--bg-secondary) 100%);
    position: relative;
}

.products-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.products-section h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-weight: 700;
}

.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.product-info h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

.product-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
}

.video-card--pro {
    max-width: 500px;
    margin: 0 auto;
}

/* === 下载部分样式 === */
.download-section {
    background: var(--bg-primary);
    padding: var(--spacing-3xl) 0;
}

.download-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.download-header h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.download-header i {
    margin-left: var(--spacing-sm);
    color: var(--secondary-color);
}

.download-container {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: var(--spacing-3xl);
    max-width: 1000px;
    margin: 0 auto;
}

.app-info-card,
.qr-code-section {
    flex: 1 1 0%;
    max-width: 480px;
    min-width: 380px;
    min-height: 420px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: var(--transition-normal);
    padding: var(--spacing-2xl);
    text-align: center;
}

.app-info-card:hover,
.qr-code-section:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.qr-code-section {
    position: relative;
    overflow: hidden;
}

.qr-code-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(255, 152, 0, 0.12) 0%, rgba(255, 193, 7, 0.08) 40%, rgba(255, 224, 130, 0.04) 70%, transparent 100%);
    z-index: 1;
    pointer-events: none;
    border-radius: var(--radius-xl);
}

.qr-code-section > * {
    position: relative;
    z-index: 2;
}

.app-icon {
    margin-bottom: var(--spacing-lg);
}

.app-icon img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.app-name {
    font-size: 1.8rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.app-description {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.app-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    font-size: 0.9rem;
    color: var(--text-tertiary);
    flex-wrap: wrap;
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.android-download-btn.primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--bg-primary);
    text-decoration: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
    min-width: 240px;
    justify-content: center;
}

.store-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.store-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
    background: var(--bg-primary);
}

.store-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.store-btn.huawei:hover {
    border-color: #ff6900;
    color: #ff6900;
}

.store-btn.xiaomi:hover {
    border-color: #ff6900;
    color: #ff6900;
}

.store-btn.tencent:hover {
    border-color: #00d4aa;
    color: #00d4aa;
}

.ios-status {
    text-align: center;
    padding: var(--spacing-lg);
    background: rgba(0, 180, 216, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 180, 216, 0.1);
    margin-top: var(--spacing-lg);
}

.ios-status p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.email-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-right: var(--spacing-sm);
    width: 200px;
    font-size: 0.9rem;
}

.notify-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary-color);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.notify-btn:hover {
    background: #0077B6;
}

.compatibility-notice {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.device-support {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    justify-content: center;
}

.device-support.supported {
    background: #e8f5e8;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.device-support.coming-soon {
    background: #fff3e0;
    color: #f57c00;
    border: 1px solid #ffcc02;
}

.download-hint {
    background: #e3f2fd;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
}

.download-hint p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.android-download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--bg-primary);
    text-decoration: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.android-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.android-download-btn i {
    font-size: 1.2rem;
}

.system-requirement {
    margin-top: var(--spacing-lg);
    font-size: 0.85rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.qr-code-img {
    width: 160px;
    height: 160px;
    right: -100px;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    background: var(--bg-primary);
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    border: 2px solid rgba(135, 205, 223, 0.1);
    margin-bottom: var(--spacing-lg);
}

.qr-code-img:hover {
    transform: scale(1.25);
    box-shadow: var(--shadow-lg);
    border-color: rgba(132, 173, 219, 0.2);
}


.qr-code-info h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    position: relative;
}

.qr-code-info h4::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, #ff9800, #ffc107);
    border-radius: 1px;
}

.qr-code-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.device-support {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: #e8f4fd;
    color: #1976d2;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* === 页脚样式 === */
footer {
    background: var(--primary-color);
    color: var(--bg-primary);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--bg-primary);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.95rem;
}

.footer-section a:hover {
    color: var(--bg-primary);
    transform: translateX(3px);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 1200px;
    margin: 0 auto;
}

.compliance-notice {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 3px solid #FFD166;
}

.compliance-notice p {
    font-size: 0.85rem;
    opacity: 0.9;
    margin: 0;
    color: var(--bg-primary);
}

.compliance-notice i {
    color: #FFD166;
    margin-right: var(--spacing-xs);
}

.footer-bottom p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin: var(--spacing-xs) 0;
}

/* === 产品核心优势 === */
.features-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.features-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(66, 153, 225, 0.1) 0%, rgba(255, 255, 255, 0) 70%);
    border-radius: 50%;
}
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.section-title p {
    color: var(--light-text);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}
 
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.8rem;
}
 
.feature-item {
    text-align: center;
    padding: 1.8rem 1.2rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--secondary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s ease;
    z-index: -1;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.feature-item:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    transition: transform 0.3s ease, color 0.3s ease;
    display: inline-block;
}

.feature-item:hover i {
    transform: scale(1.15) rotate(5deg);
    color: var(--secondary-color);
}

.feature-item h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.feature-item:hover h3 {
    color: var(--secondary-color);
}

.feature-item p {
    color: var(--light-text);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .section-title h2 {
        font-size: 1.6rem;
    }
    
    .feature-item {
        padding: 1.5rem 1.2rem;
    }
}

/* === 动画定义 === */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-container {
        gap: var(--spacing-2xl);
    }
    
    .phone-mockup {
        max-width: 250px;
    }
    
    nav ul {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    nav ul {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-primary);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-lg);
        transition: var(--transition-normal);
        border-top: 1px solid var(--border-color);
        overflow-y: auto;
        z-index: 999;
    }
    
    nav ul.active {
        left: 0;
    }
    
    nav ul li {
        width: 100%;
        margin-bottom: var(--spacing-md);
    }
    
    nav ul li a {
        display: block;
        width: 100%;
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
        font-size: 1rem;
    }
    
    .hero-section {
        min-height: auto;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        max-width: none;
    }
    
    .hero-cta {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .cta-primary, .cta-secondary {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .floating-card {
        display: none;
    }
    
    .phone-mockup {
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-badge {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
}